Tupu analysis of land use intensity using semi-variancein Yinchuan Plain

Application of geo-information tupu to study the spatial variation law of the land use intensity can reveal the change features of the location of the land use intensity, and provide a basis to regional land resources optimization allocation and social-economic sustainable development. In this paper, taking Yinchuan Plain as study area, the land use intensity tupu in the 2010 was studied by land use remote sensing mapping and geo-statistics based on semi-variance. The results show that there are obvious spatial regularities in the land use intensity of the Yinchuan Plain, which displaying the South-North directional, and performing obvious characteristics of the ribbon in the middle of the Yinchuan Plain. It shows obvious ring features in the south, and the land use intensity is weak in the north and west of Yinchuan Plain. Administrative center at all levels, irrigation drainage system and transport network control the spatial distribution pattern of land use intensity. Strengthening the land use control and layout optimization of the surrounding areas at all levels settlements is the focus of the current land use management of Yinchuan plain, and strengthening remediation use of low-yielding fields in the western and northern parts of the Yinchuan Plain is the key and difficult points of the local land consolidation project.